<template>
    <div class="todo-footer">
        <label>
            <!-- <input type="checkbox" :checked ="tagNum === allList && allList" /> -->
            <input type="checkbox" v-model="isCheckAll" />
        </label>
        <span>
            <span>已完成{{tagNum}}</span> / 全部{{allList}}
        </span>
        <button class="btn btn-danger" @click="handleClick">清除已完成任务</button>
    </div>
</template>

<script>
export default {
    name:"TodoFooter",
    props:{
      allList:{
        type: Number,
        required: true,
      },
      tagNum:{
        type: Number,
        required: true,
      },
      isSelectAll:{
        type: Function,
        required: true,
      },
      delDone:{
        type: Function,
        required: true,
      },
    },
    methods:{
      // 清除已完成任务
      handleClick(){
        alert("确认删除已选中的任务：");
        this.delDone();
      }
    },
    computed:{
      // 是否全选
      isCheckAll:{
        get(){
          return this.tagNum === this.allList && this.allList;
        },
        set(val){
          // console.log(val);
          this.isSelectAll(val)
        }
      }
    }

}
</script>

<style>
/*footer*/
.todo-footer {
  height: 40px;
  line-height: 40px;
  padding-left: 6px;
  margin-top: 5px;
}

.todo-footer label {
  display: inline-block;
  margin-right: 20px;
  cursor: pointer;
}

.todo-footer label input {
  position: relative;
  top: -1px;
  vertical-align: middle;
  margin-right: 5px;
}

.todo-footer button {
  float: right;
  margin-top: 5px;
}   
</style>